Re: check engine light (ON) 06 STS

the misfire is due to a coil issue and will not go away until that is dealt with

as a precaution i might as well change the ignition coil and see what happens

edit: sorry about the "term" but it had something to do with the crankcase. and you are right, it had nothing to do with the ignition coil in the first place. i learnt that firestone is not a reliable place to go to

Re: check engine light (ON) 06 STS

My light came on yesterday and blinked for a few seconds then went to steady. It didnt throw any codes though. I do have P0430 right now with a bad catalytic converter so the light has been on for a week now. It seems like the engine is louder though and missing power at hard acceleration. normal driving is fine and MPG is unaffected. I just joined this forum today to find a fix.

My 05 3.6 STS just started same thing only my light flashes bout 5 times during hard acceleration but good rest of time. Gonna try and tackle this job myself once I find out what spark plug(s) are needed. But since my light doesn't stay on, I'm afraid they won't be able to figure out exactly what's wrong using their diagnostic equipment. Least not until it's staying on steady. But I'm sure coil pack will prob need replaced. Idk how hard these engines are to work on but I'll find out. Lol

Just outa curiosity, what did your mechanic charge to do the work with parts for ur coil pack and plugs?

Re: check engine light (ON) 06 STS

POWERWASHED THE MOTOR WHILE IT WAS RUNNING ON SATURDAY. Started chugging. Engine light came on immediately. I have v-8 2005 sts. 205,000 miles on it.
Took to dealer today. code came up for misfiring number 8 cylinder only. Recommending new coil for low price of 600.00 parts & labor.

Also recommending cleaning throttle body (thought I probably accomplished that with the powerwasher: )) 135.00 parts & labor.
Is this close to a decent deal?

What did I do with the power washer to make the coil go bad? MANY THANKS TO THIS FORUM FOR GETTING MY VEHICLE TO 200,000 MILES!!!
BOB

Re: check engine light (ON) 06 STS

I've never washed my engine while it was running but I don't know that really relates to the problem. When I wash mine, I always use the low pressure tire/engine cleaner, let it sit a while and then rinse it with the spot free rinse option (also low pressure). All the electrical connectors are sealed so there shouldn't be a concern with water intrusion, however with a high pressure wash, this is still a possibility of moisture getting past the seals. You may have a cracked coil either because (relatively) cold water hit it while it was hot or it was already cracked and the introduction of water caused the problem to become apparent.

When they refer to cleaning the throttle body, they are referring to internal cleaning. A pressure washer won't accomplish this for you.

Re: check engine light (ON) 06 STS

Thanks ddalder!
So it doesn't sound like your completely offended by the cost of these two repairs.
I am going to have the work done.
I will follow your direction on future engine cleaning.
Best Regards

Re: check engine light (ON) 06 STS

I can't really speak to the quote because I know the US part and labour prices are much lower than here in Canada. The dealerships here charge in/around $140/hour and part costs seem to be near double the US in many cases.